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Solution: All O`one Data Structure

Understand how to design and implement the AllOne data structure using a combination of hash maps and a doubly linked list. This lesson guides you through achieving O(1) time complexity for incrementing, decrementing, and retrieving keys with maximum and minimum frequencies, enabling efficient frequency tracking of string keys.

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Statement

Design a data structure that tracks the frequency of string keys and allows for efficient updates and queries.

Implement the AllOne class with these methods:

  • Constructor: Initializes the data structure.

  • inc(String key): Increases the count of the given key by 11 ...